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Functional Dyspepsia and Symptom Perception

2015年8月12日 更新者：Maastricht University Medical Center

Symptom Perception in Patients With Functional Dyspepsia: Involvement of the TRPV-1 Neuropeptide Pathway

Functional dyspepsia (FD) is a heterogeneous disorder with multifactorial pathophysiology. Patients with FD have visceral hypersensitivity to mechanical and chemical stimuli. Several previous studies have described an increased chemosensitivity to oral capsaicin ingestion. Capsaicin is a natural agonist of TRPV-1 receptors present on afferent sensory neurons. Activation of the TRPV-1 receptor by capsaicin or other agonists results in the release of several neuropeptides (i.e. substance P, somatostatin). Besides, increased duodenal permeability and disruption of tight junction structure in FD patients compared to healthy volunteers has been reported in a recent study. In this observational study investigators will evaluate the role of the TRPV-1 neuropeptide pathway in patients with functional dyspepsia and healthy controls.

調査の概要

状態

わからない

条件

研究の種類

観察的

入学 (予想される)

70

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究場所

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

18年～65年 (大人、高齢者)

健康ボランティアの受け入れ

はい

受講資格のある性別

全て

サンプリング方法

確率サンプル

調査対象母集団

50 patients with functional dyspepsia and 20 healthy controls will be included

説明

Healthy volunteers

Inclusion criteria:

- No gastrointestinal symptoms or history of gastrointestinal disease meeting ROME III criteria for functional dyspepsia and Irritable Bowel Syndrome (IBS).

Exclusion criteria:

  • Inability to stop the intake of nonsteroidal antiinflammatory drugs (NSAIDs) within 14 days prior to endoscopy and within two days prior to multi-sugar test.
  • Inability to stop the intake of medication affecting gastrointestinal function (e.g. proton pump inhibitors, prokinetics, laxatives) within 5 days prior to endoscopy, multi-sugar test and combined meal- and gastric emptying test
  • Current use of antidepressants
  • Medical history of diabetes mellitus
  • Medical history of coeliac disease
  • Organic disease at upper gastrointestinal endoscopy (i.e. erosive esophagitis, Barrett's esophagus, benign esophageal stricture, Schatzki ring, esophageal carcinoma, esophageal candidiasis, gastric ulcer, gastric erosions, gastric cancer, duodenal erosions or duodenal ulcer)
  • First-degree family members with diabetes mellitus type I, coeliac disease, Crohn's disease or ulcerative colitis
  • Medical history of food allergy or anamnestic evidence of food allergy
  • Presence of coagulation disorders or use of the following anticoagulants: coumarin derivates, new oral anticoagulants (NOACs: dabigatran, apixaban and rivaroxaban), and clopidogrel (Patients or healthy controls using calcium carbasalate (acetylsalicylic acid 100mg 1dd1) are eligible to participate in the study. Patients or healthy controls using higher doses of calcium carbasalate will be excluded from the study).
  • Dieting
  • Pregnancy or lactation
  • Smoking
  • Excessive alcohol use (>20 alcoholic consumptions/week) and inability to avoid use of alcohol in the 2 days prior to endoscopy and multi-sugar test

Functional dyspepsia patients

Inclusion criteria:

- Patients referred for upper gastrointestinal endoscopy by either general practitioners or physicians from the gastroenterology outpatient clinic and meeting ROME III criteria for functional dyspepsia.

Exclusion criteria:

  • Inability to stop the intake of nonsteroidal antiinflammatory drugs (NSAIDs) within 14 days prior to endoscopy and within two days prior to multi-sugar test.
  • Inability to stop the intake of medication affecting gastrointestinal function (e.g. proton pump inhibitors, prokinetics, laxatives) within 5 days prior to endoscopy, multi-sugar test and combined meal- and gastric emptying test
  • Current use of antidepressants
  • Medical history of diabetes mellitus
  • Medical history of coeliac disease
  • Organic disease at upper gastrointestinal endoscopy (i.e. erosive esophagitis, Barrett's esophagus, benign esophageal stricture, Schatzki ring, esophageal carcinoma, esophageal candidiasis, gastric ulcer, gastric erosions, gastric cancer, duodenal erosions or duodenal ulcer)
  • First-degree family members with diabetes mellitus type I, coeliac disease, Crohn's disease or ulcerative colitis
  • Medical history of food allergy or anamnestic evidence of food allergy
  • Presence of coagulation disorders or use of the following anticoagulants: coumarin derivates, new oral anticoagulants (NOACs: dabigatran, apixaban and rivaroxaban), and clopidogrel (Patients or healthy controls using calcium carbasalate (acetylsalicylic acid 100mg 1dd1) are eligible to participate in the study. Patients or healthy controls using higher doses of calcium carbasalate will be excluded from the study).
  • Dieting
  • Pregnancy or lactation
  • Smoking
  • Excessive alcohol use (>20 alcoholic consumptions/week) and inability to avoid use of alcohol in the 2 days prior to endoscopy and multi-sugar test

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか？

デザインの詳細

コホートと介入

グループ/コホート
健康管理
Patients with functional dyspepsia

この研究は何を測定していますか？

主要な結果の測定

結果測定
メジャーの説明
時間枠
TRPV-1 neuropeptide pathway (TRPV-1 and mucosal neuropeptides)
時間枠：Test day 1: mucosal biopsies are taken during upper gastrointestinal endoscopy
The primary outcome measure is the TRPV-1 neuropeptide pathway which includes both TRPV-1 and mucosal neuropeptide concentrations (e.g. substance P, somatostatin), assessed with real time polymerase chain reaction (PCR) and radioimmunoassay respectively.
Test day 1: mucosal biopsies are taken during upper gastrointestinal endoscopy

二次結果の測定

結果測定
メジャーの説明
時間枠
Symptom scores for psychopathology
時間枠：14-day period between testday 1 and testday 2

The Patient Health Questionnaire 9 (PHQ-9) and GAD-7 questionnaires will be used for the assessment of depressive and anxiety disorders respectively.

During 7 consecutive days a digital device will be carried out for assessment of symptoms several times a day (experience sampling method/ESM).
14-day period between testday 1 and testday 2
Symptom scores for dyspepsia
時間枠：14-day period between testday 1 and testday 2

Dyspeptic symptoms will be measured with two questionnaires to acquire more detailed information about complaints in patients with functional dyspepsia. The dyspepsia symptom questionnaire and the symptom checklist of the Nepean Dyspepsia Index will be used to grade the presence and intensity of dyspeptic symptoms.

In addition, participants will report dyspeptic symptoms during 14 consecutive days in an end-of-day diary.

During 7 consecutive days a digital device will be carried out for assessment of symptoms several times a day (experience sampling method/ESM).
14-day period between testday 1 and testday 2
Symptom scores for quality of life
時間枠：This questionnaire is fulfilled once, in the 14-day period between testday 1 and testday 2
Quality of life will be assessed with the Health Survey 26 (SF-36) questionnaire.
This questionnaire is fulfilled once, in the 14-day period between testday 1 and testday 2
Postprandial symptoms after ingestion of a standardized meal
時間枠：Testday 2: Postprandial symptoms are scored using a Likert scale at 15-minute intervals for a period of 240 minutes postprandial.
Testday 2: Postprandial symptoms are scored using a Likert scale at 15-minute intervals for a period of 240 minutes postprandial.
In vivo gastroduodenal and small intestinal permeability
時間枠：Day before testday 2
Gastroduodenal en small intestinal permeability will be assessed with a multisugar test.
Day before testday 2
Transcription of genes encoding for proteins involved in mucosal barrier function and symptom perception
時間枠：Testday 1: gastric and duodenal biopsies are taken during upper gastrointestinal endoscopy.
Testday 1: gastric and duodenal biopsies are taken during upper gastrointestinal endoscopy.
Serotonin metabolism in mucosal tissue
時間枠：Testday 1: gastric and duodenal biopsies are taken during upper gastrointestinal endoscopy
Testday 1: gastric and duodenal biopsies are taken during upper gastrointestinal endoscopy
Serotonin metabolism in plasm
時間枠：Testday 2: blood samples for serotonin analyses are taken preprandial and every 30 minutes after intake of a standardized meal during 240 minutes postprandial.
Testday 2: blood samples for serotonin analyses are taken preprandial and every 30 minutes after intake of a standardized meal during 240 minutes postprandial.
Gastric emptying for solids using the 13C-sodium octanoate stable isotope breath test
時間枠：Testday 2: Repeated measure: breath samples for analysis of gastric emptying are taken preprandial and every 15 minutes after intake of a standardized meal during 240 minutes postprandial.
Testday 2: Repeated measure: breath samples for analysis of gastric emptying are taken preprandial and every 15 minutes after intake of a standardized meal during 240 minutes postprandial.

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

Maastricht University Medical Center

捜査官

  • 主任研究者：Jose Conchillo, MD, PhD、Maastricht University Medical Center, Maastricht, The Netherlands

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始

2015年7月1日

一次修了 (予想される)

2017年7月1日

研究の完了 (予想される)

2017年7月1日

試験登録日

最初に提出

2015年7月29日

QC基準を満たした最初の提出物

2015年8月12日

最初の投稿 (見積もり)

2015年8月13日

学習記録の更新

投稿された最後の更新 (見積もり)

2015年8月13日

QC基準を満たした最後の更新が送信されました

2015年8月12日

最終確認日

2015年7月1日

詳しくは

本研究に関する用語

追加の関連 MeSH 用語

その他の研究ID番号

  • METC142070

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